2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/addrconf.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
37 void ieee80211_configure_filter(struct ieee80211_local *local)
40 unsigned int changed_flags;
41 unsigned int new_flags = 0;
43 if (atomic_read(&local->iff_promiscs))
44 new_flags |= FIF_PROMISC_IN_BSS;
46 if (atomic_read(&local->iff_allmultis))
47 new_flags |= FIF_ALLMULTI;
49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
51 new_flags |= FIF_BCN_PRBRESP_PROMISC;
53 if (local->fif_probe_req || local->probe_req_reg)
54 new_flags |= FIF_PROBE_REQ;
56 if (local->fif_fcsfail)
57 new_flags |= FIF_FCSFAIL;
59 if (local->fif_plcpfail)
60 new_flags |= FIF_PLCPFAIL;
62 if (local->fif_control)
63 new_flags |= FIF_CONTROL;
65 if (local->fif_other_bss)
66 new_flags |= FIF_OTHER_BSS;
68 if (local->fif_pspoll)
69 new_flags |= FIF_PSPOLL;
71 spin_lock_bh(&local->filter_lock);
72 changed_flags = local->filter_flags ^ new_flags;
74 mc = drv_prepare_multicast(local, &local->mc_list);
75 spin_unlock_bh(&local->filter_lock);
80 drv_configure_filter(local, changed_flags, &new_flags, mc);
82 WARN_ON(new_flags & (1<<31));
84 local->filter_flags = new_flags & ~(1<<31);
87 static void ieee80211_reconfig_filter(struct work_struct *work)
89 struct ieee80211_local *local =
90 container_of(work, struct ieee80211_local, reconfig_filter);
92 ieee80211_configure_filter(local);
95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97 struct ieee80211_sub_if_data *sdata;
98 struct ieee80211_channel *chan;
101 enum nl80211_channel_type channel_type;
104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105 if (local->scan_channel) {
106 chan = local->scan_channel;
107 /* If scanning on oper channel, use whatever channel-type
108 * is currently in use.
110 if (chan == local->_oper_channel)
111 channel_type = local->_oper_channel_type;
113 channel_type = NL80211_CHAN_NO_HT;
114 } else if (local->tmp_channel) {
115 chan = local->tmp_channel;
116 channel_type = NL80211_CHAN_NO_HT;
118 chan = local->_oper_channel;
119 channel_type = local->_oper_channel_type;
122 if (chan != local->_oper_channel ||
123 channel_type != local->_oper_channel_type)
124 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
126 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;
128 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
130 if (offchannel_flag || chan != local->hw.conf.channel ||
131 channel_type != local->hw.conf.channel_type) {
132 local->hw.conf.channel = chan;
133 local->hw.conf.channel_type = channel_type;
134 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
137 if (!conf_is_ht(&local->hw.conf)) {
139 * mac80211.h documents that this is only valid
140 * when the channel is set to an HT type, and
141 * that otherwise STATIC is used.
143 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
144 } else if (local->hw.conf.smps_mode != local->smps_mode) {
145 local->hw.conf.smps_mode = local->smps_mode;
146 changed |= IEEE80211_CONF_CHANGE_SMPS;
149 power = chan->max_power;
152 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
153 if (!rcu_access_pointer(sdata->vif.chanctx_conf))
155 power = min(power, sdata->vif.bss_conf.txpower);
159 if (local->hw.conf.power_level != power) {
160 changed |= IEEE80211_CONF_CHANGE_POWER;
161 local->hw.conf.power_level = power;
167 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
173 if (!local->use_chanctx)
174 changed |= ieee80211_hw_conf_chan(local);
176 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
177 IEEE80211_CONF_CHANGE_POWER);
179 if (changed && local->open_count) {
180 ret = drv_config(local, changed);
183 * HW reconfiguration should never fail, the driver has told
184 * us what it can support so it should live up to that promise.
187 * rfkill is not integrated with mac80211 and a
188 * configuration command can thus fail if hardware rfkill
191 * FIXME: integrate rfkill with mac80211 and then add this
201 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
204 struct ieee80211_local *local = sdata->local;
209 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
212 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
214 sdata->vif.bss_conf.use_cts_prot = false;
215 sdata->vif.bss_conf.use_short_preamble = false;
216 sdata->vif.bss_conf.use_short_slot = false;
217 return BSS_CHANGED_ERP_CTS_PROT |
218 BSS_CHANGED_ERP_PREAMBLE |
219 BSS_CHANGED_ERP_SLOT;
222 static void ieee80211_tasklet_handler(unsigned long data)
224 struct ieee80211_local *local = (struct ieee80211_local *) data;
227 while ((skb = skb_dequeue(&local->skb_queue)) ||
228 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
229 switch (skb->pkt_type) {
230 case IEEE80211_RX_MSG:
231 /* Clear skb->pkt_type in order to not confuse kernel
234 ieee80211_rx(&local->hw, skb);
236 case IEEE80211_TX_STATUS_MSG:
238 ieee80211_tx_status(&local->hw, skb);
241 WARN(1, "mac80211: Packet is of unknown type %d\n",
249 static void ieee80211_restart_work(struct work_struct *work)
251 struct ieee80211_local *local =
252 container_of(work, struct ieee80211_local, restart_work);
254 /* wait for scan work complete */
255 flush_workqueue(local->workqueue);
257 mutex_lock(&local->mtx);
258 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) ||
259 rcu_dereference_protected(local->sched_scan_sdata,
260 lockdep_is_held(&local->mtx)),
261 "%s called with hardware scan in progress\n", __func__);
262 mutex_unlock(&local->mtx);
265 ieee80211_scan_cancel(local);
266 ieee80211_reconfig(local);
270 void ieee80211_restart_hw(struct ieee80211_hw *hw)
272 struct ieee80211_local *local = hw_to_local(hw);
274 trace_api_restart_hw(local);
276 wiphy_info(hw->wiphy,
277 "Hardware restart was requested\n");
279 /* use this reason, ieee80211_reconfig will unblock it */
280 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
281 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
284 * Stop all Rx during the reconfig. We don't want state changes
285 * or driver callbacks while this is in progress.
287 local->in_reconfig = true;
290 schedule_work(&local->restart_work);
292 EXPORT_SYMBOL(ieee80211_restart_hw);
295 static int ieee80211_ifa_changed(struct notifier_block *nb,
296 unsigned long data, void *arg)
298 struct in_ifaddr *ifa = arg;
299 struct ieee80211_local *local =
300 container_of(nb, struct ieee80211_local,
302 struct net_device *ndev = ifa->ifa_dev->dev;
303 struct wireless_dev *wdev = ndev->ieee80211_ptr;
304 struct in_device *idev;
305 struct ieee80211_sub_if_data *sdata;
306 struct ieee80211_bss_conf *bss_conf;
307 struct ieee80211_if_managed *ifmgd;
310 /* Make sure it's our interface that got changed */
314 if (wdev->wiphy != local->hw.wiphy)
317 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
318 bss_conf = &sdata->vif.bss_conf;
320 /* ARP filtering is only supported in managed mode */
321 if (sdata->vif.type != NL80211_IFTYPE_STATION)
324 idev = __in_dev_get_rtnl(sdata->dev);
328 ifmgd = &sdata->u.mgd;
329 mutex_lock(&ifmgd->mtx);
331 /* Copy the addresses to the bss_conf list */
332 ifa = idev->ifa_list;
334 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
335 bss_conf->arp_addr_list[c] = ifa->ifa_address;
340 bss_conf->arp_addr_cnt = c;
342 /* Configure driver only if associated (which also implies it is up) */
343 if (ifmgd->associated)
344 ieee80211_bss_info_change_notify(sdata,
345 BSS_CHANGED_ARP_FILTER);
347 mutex_unlock(&ifmgd->mtx);
353 #if IS_ENABLED(CONFIG_IPV6)
354 static int ieee80211_ifa6_changed(struct notifier_block *nb,
355 unsigned long data, void *arg)
357 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
358 struct inet6_dev *idev = ifa->idev;
359 struct net_device *ndev = ifa->idev->dev;
360 struct ieee80211_local *local =
361 container_of(nb, struct ieee80211_local, ifa6_notifier);
362 struct wireless_dev *wdev = ndev->ieee80211_ptr;
363 struct ieee80211_sub_if_data *sdata;
365 /* Make sure it's our interface that got changed */
366 if (!wdev || wdev->wiphy != local->hw.wiphy)
369 sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
372 * For now only support station mode. This is mostly because
373 * doing AP would have to handle AP_VLAN in some way ...
375 if (sdata->vif.type != NL80211_IFTYPE_STATION)
378 drv_ipv6_addr_change(local, sdata, idev);
384 /* There isn't a lot of sense in it, but you can transmit anything you like */
385 static const struct ieee80211_txrx_stypes
386 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
387 [NL80211_IFTYPE_ADHOC] = {
389 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
390 BIT(IEEE80211_STYPE_AUTH >> 4) |
391 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
392 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
394 [NL80211_IFTYPE_STATION] = {
396 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
399 [NL80211_IFTYPE_AP] = {
401 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
402 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
403 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
404 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
405 BIT(IEEE80211_STYPE_AUTH >> 4) |
406 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
407 BIT(IEEE80211_STYPE_ACTION >> 4),
409 [NL80211_IFTYPE_AP_VLAN] = {
412 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
413 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
414 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
415 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
416 BIT(IEEE80211_STYPE_AUTH >> 4) |
417 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
418 BIT(IEEE80211_STYPE_ACTION >> 4),
420 [NL80211_IFTYPE_P2P_CLIENT] = {
422 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
425 [NL80211_IFTYPE_P2P_GO] = {
427 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
428 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
429 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
430 BIT(IEEE80211_STYPE_DISASSOC >> 4) |
431 BIT(IEEE80211_STYPE_AUTH >> 4) |
432 BIT(IEEE80211_STYPE_DEAUTH >> 4) |
433 BIT(IEEE80211_STYPE_ACTION >> 4),
435 [NL80211_IFTYPE_MESH_POINT] = {
437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
438 BIT(IEEE80211_STYPE_AUTH >> 4) |
439 BIT(IEEE80211_STYPE_DEAUTH >> 4),
441 [NL80211_IFTYPE_P2P_DEVICE] = {
443 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
444 BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
448 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
449 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
450 IEEE80211_HT_AMPDU_PARM_DENSITY,
452 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
453 IEEE80211_HT_CAP_MAX_AMSDU |
454 IEEE80211_HT_CAP_SGI_20 |
455 IEEE80211_HT_CAP_SGI_40),
457 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
458 0xff, 0xff, 0xff, 0xff, 0xff, },
462 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
464 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
465 IEEE80211_VHT_CAP_SHORT_GI_80 |
466 IEEE80211_VHT_CAP_SHORT_GI_160 |
467 IEEE80211_VHT_CAP_RXSTBC_1 |
468 IEEE80211_VHT_CAP_RXSTBC_2 |
469 IEEE80211_VHT_CAP_RXSTBC_3 |
470 IEEE80211_VHT_CAP_RXSTBC_4 |
471 IEEE80211_VHT_CAP_TXSTBC |
472 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
473 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
474 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
475 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
476 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
478 .rx_mcs_map = cpu_to_le16(~0),
479 .tx_mcs_map = cpu_to_le16(~0),
483 static const u8 extended_capabilities[] = {
485 WLAN_EXT_CAPA8_OPMODE_NOTIF,
488 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
489 const struct ieee80211_ops *ops)
491 struct ieee80211_local *local;
496 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
497 !ops->add_interface || !ops->remove_interface ||
498 !ops->configure_filter))
501 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
504 /* check all or no channel context operations exist */
505 i = !!ops->add_chanctx + !!ops->remove_chanctx +
506 !!ops->change_chanctx + !!ops->assign_vif_chanctx +
507 !!ops->unassign_vif_chanctx;
508 if (WARN_ON(i != 0 && i != 5))
510 use_chanctx = i == 5;
512 /* Ensure 32-byte alignment of our private data and hw private data.
513 * We use the wiphy priv data for both our ieee80211_local and for
514 * the driver's private data
516 * In memory it'll be like this:
518 * +-------------------------+
520 * +-------------------------+
521 * | struct ieee80211_local |
522 * +-------------------------+
523 * | driver's private data |
524 * +-------------------------+
527 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
529 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
534 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;
536 wiphy->privid = mac80211_wiphy_privid;
538 wiphy->flags |= WIPHY_FLAG_NETNS_OK |
539 WIPHY_FLAG_4ADDR_AP |
540 WIPHY_FLAG_4ADDR_STATION |
541 WIPHY_FLAG_REPORTS_OBSS |
542 WIPHY_FLAG_OFFCHAN_TX;
544 wiphy->extended_capabilities = extended_capabilities;
545 wiphy->extended_capabilities_mask = extended_capabilities;
546 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities);
548 if (ops->remain_on_channel)
549 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
551 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
552 NL80211_FEATURE_SAE |
553 NL80211_FEATURE_HT_IBSS |
554 NL80211_FEATURE_VIF_TXPOWER |
555 NL80211_FEATURE_USERSPACE_MPM;
558 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
559 NL80211_FEATURE_AP_SCAN;
563 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
565 wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
567 local = wiphy_priv(wiphy);
569 local->hw.wiphy = wiphy;
571 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
574 local->use_chanctx = use_chanctx;
576 /* set up some defaults */
577 local->hw.queues = 1;
578 local->hw.max_rates = 1;
579 local->hw.max_report_rates = 0;
580 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
581 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
582 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
583 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
584 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
585 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
586 IEEE80211_RADIOTAP_MCS_HAVE_GI |
587 IEEE80211_RADIOTAP_MCS_HAVE_BW;
588 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
589 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
590 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
591 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
592 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
594 INIT_LIST_HEAD(&local->interfaces);
596 __hw_addr_init(&local->mc_list);
598 mutex_init(&local->iflist_mtx);
599 mutex_init(&local->mtx);
601 mutex_init(&local->key_mtx);
602 spin_lock_init(&local->filter_lock);
603 spin_lock_init(&local->rx_path_lock);
604 spin_lock_init(&local->queue_stop_reason_lock);
606 INIT_LIST_HEAD(&local->chanctx_list);
607 mutex_init(&local->chanctx_mtx);
609 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
611 INIT_WORK(&local->restart_work, ieee80211_restart_work);
613 INIT_WORK(&local->radar_detected_work,
614 ieee80211_dfs_radar_detected_work);
616 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
617 local->smps_mode = IEEE80211_SMPS_OFF;
619 INIT_WORK(&local->dynamic_ps_enable_work,
620 ieee80211_dynamic_ps_enable_work);
621 INIT_WORK(&local->dynamic_ps_disable_work,
622 ieee80211_dynamic_ps_disable_work);
623 setup_timer(&local->dynamic_ps_timer,
624 ieee80211_dynamic_ps_timer, (unsigned long) local);
626 INIT_WORK(&local->sched_scan_stopped_work,
627 ieee80211_sched_scan_stopped_work);
629 spin_lock_init(&local->ack_status_lock);
630 idr_init(&local->ack_status_frames);
632 sta_info_init(local);
634 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
635 skb_queue_head_init(&local->pending[i]);
636 atomic_set(&local->agg_queue_stop[i], 0);
638 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
639 (unsigned long)local);
641 tasklet_init(&local->tasklet,
642 ieee80211_tasklet_handler,
643 (unsigned long) local);
645 skb_queue_head_init(&local->skb_queue);
646 skb_queue_head_init(&local->skb_queue_unreliable);
648 ieee80211_led_names(local);
650 ieee80211_roc_setup(local);
654 EXPORT_SYMBOL(ieee80211_alloc_hw);
656 int ieee80211_register_hw(struct ieee80211_hw *hw)
658 struct ieee80211_local *local = hw_to_local(hw);
660 enum ieee80211_band band;
661 int channels, max_bitrates;
662 bool supp_ht, supp_vht;
663 netdev_features_t feature_whitelist;
664 static const u32 cipher_suites[] = {
665 /* keep WEP first, it may be removed below */
666 WLAN_CIPHER_SUITE_WEP40,
667 WLAN_CIPHER_SUITE_WEP104,
668 WLAN_CIPHER_SUITE_TKIP,
669 WLAN_CIPHER_SUITE_CCMP,
671 /* keep last -- depends on hw flags! */
672 WLAN_CIPHER_SUITE_AES_CMAC
675 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
676 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
677 local->hw.offchannel_tx_hw_queue >= local->hw.queues))
681 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) &&
682 (!local->ops->suspend || !local->ops->resume))
686 if (!local->use_chanctx) {
687 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
688 const struct ieee80211_iface_combination *comb;
690 comb = &local->hw.wiphy->iface_combinations[i];
692 if (comb->num_different_channels > 1)
697 * WDS is currently prohibited when channel contexts are used
698 * because there's no clear definition of which channel WDS
699 * type interfaces use
701 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
704 /* DFS currently not supported with channel context drivers */
705 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
706 const struct ieee80211_iface_combination *comb;
708 comb = &local->hw.wiphy->iface_combinations[i];
710 if (comb->radar_detect_widths)
715 /* Only HW csum features are currently compatible with mac80211 */
716 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
718 if (WARN_ON(hw->netdev_features & ~feature_whitelist))
721 if (hw->max_report_rates == 0)
722 hw->max_report_rates = hw->max_rates;
724 local->rx_chains = 1;
727 * generic code guarantees at least one band,
728 * set this very early because much code assumes
729 * that hw.conf.channel is assigned
735 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
736 struct ieee80211_supported_band *sband;
738 sband = local->hw.wiphy->bands[band];
741 if (!local->use_chanctx && !local->_oper_channel) {
742 /* init channel we're on */
743 local->hw.conf.channel =
744 local->_oper_channel = &sband->channels[0];
745 local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
747 cfg80211_chandef_create(&local->monitor_chandef,
750 channels += sband->n_channels;
752 if (max_bitrates < sband->n_bitrates)
753 max_bitrates = sband->n_bitrates;
754 supp_ht = supp_ht || sband->ht_cap.ht_supported;
755 supp_vht = supp_vht || sband->vht_cap.vht_supported;
757 if (sband->ht_cap.ht_supported)
759 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
762 /* TODO: consider VHT for RX chains, hopefully it's the same */
765 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
766 sizeof(void *) * channels, GFP_KERNEL);
767 if (!local->int_scan_req)
770 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
771 if (!local->hw.wiphy->bands[band])
773 local->int_scan_req->rates[band] = (u32) -1;
776 /* if low-level driver supports AP, we also support VLAN */
777 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
778 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
779 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
782 /* mac80211 always supports monitor */
783 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
784 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);
786 /* mac80211 doesn't support more than one IBSS interface right now */
787 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
788 const struct ieee80211_iface_combination *c;
791 c = &hw->wiphy->iface_combinations[i];
793 for (j = 0; j < c->n_limits; j++)
794 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
795 c->limits[j].max > 1)
799 #ifndef CONFIG_MAC80211_MESH
800 /* mesh depends on Kconfig, but drivers should set it if they want */
801 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
804 /* if the underlying driver supports mesh, mac80211 will (at least)
805 * provide routing of mesh authentication frames to userspace */
806 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
807 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;
809 /* mac80211 supports control port protocol changing */
810 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;
812 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
813 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
814 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
815 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
817 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
818 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
819 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
822 * Calculate scan IE length -- we need this to alloc
823 * memory and to subtract from the driver limit. It
824 * includes the DS Params, (extended) supported rates, and HT
825 * information -- SSID is the driver's responsibility.
827 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
830 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
833 local->scan_ies_len +=
834 2 + sizeof(struct ieee80211_vht_cap);
837 * (for now at least), drivers wanting to use VHT must
838 * support channel contexts, as they contain all the
839 * necessary VHT information and the global hw config
842 if (WARN_ON(!local->use_chanctx)) {
844 goto fail_wiphy_register;
848 if (!local->ops->hw_scan) {
849 /* For hw_scan, driver needs to set these up. */
850 local->hw.wiphy->max_scan_ssids = 4;
851 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
855 * If the driver supports any scan IEs, then assume the
856 * limit includes the IEs mac80211 will add, otherwise
857 * leave it at zero and let the driver sort it out; we
858 * still pass our IEs to the driver but userspace will
859 * not be allowed to in that case.
861 if (local->hw.wiphy->max_scan_ie_len)
862 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;
864 /* Set up cipher suites unless driver already did */
865 if (!local->hw.wiphy->cipher_suites) {
866 local->hw.wiphy->cipher_suites = cipher_suites;
867 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
868 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
869 local->hw.wiphy->n_cipher_suites--;
871 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
872 if (local->hw.wiphy->cipher_suites == cipher_suites) {
873 local->hw.wiphy->cipher_suites += 2;
874 local->hw.wiphy->n_cipher_suites -= 2;
882 local->hw.wiphy->cipher_suites,
883 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
887 goto fail_wiphy_register;
889 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
890 u32 suite = local->hw.wiphy->cipher_suites[r];
891 if (suite == WLAN_CIPHER_SUITE_WEP40 ||
892 suite == WLAN_CIPHER_SUITE_WEP104)
896 local->hw.wiphy->cipher_suites = suites;
897 local->hw.wiphy->n_cipher_suites = w;
898 local->wiphy_ciphers_allocated = true;
902 if (!local->ops->remain_on_channel)
903 local->hw.wiphy->max_remain_on_channel_duration = 5000;
905 if (local->ops->sched_scan_start)
906 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
908 /* mac80211 based drivers don't support internal TDLS setup */
909 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
910 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;
912 result = wiphy_register(local->hw.wiphy);
914 goto fail_wiphy_register;
917 * We use the number of queues for feature tests (QoS, HT) internally
918 * so restrict them appropriately.
920 if (hw->queues > IEEE80211_MAX_QUEUES)
921 hw->queues = IEEE80211_MAX_QUEUES;
924 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
925 if (!local->workqueue) {
931 * The hardware needs headroom for sending the frame,
932 * and we need some headroom for passing the frame to monitor
933 * interfaces, but never both at the same time.
935 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
936 IEEE80211_TX_STATUS_HEADROOM);
938 debugfs_hw_add(local);
941 * if the driver doesn't specify a max listen interval we
942 * use 5 which should be a safe default
944 if (local->hw.max_listen_interval == 0)
945 local->hw.max_listen_interval = 5;
947 local->hw.conf.listen_interval = local->hw.max_listen_interval;
949 local->dynamic_ps_forced_timeout = -1;
951 result = ieee80211_wep_init(local);
953 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
956 ieee80211_led_init(local);
960 result = ieee80211_init_rate_ctrl_alg(local,
961 hw->rate_control_algorithm);
963 wiphy_debug(local->hw.wiphy,
964 "Failed to initialize rate control algorithm\n");
968 /* add one default STA interface if supported */
969 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
970 result = ieee80211_if_add(local, "wlan%d", NULL,
971 NL80211_IFTYPE_STATION, NULL);
973 wiphy_warn(local->hw.wiphy,
974 "Failed to add default virtual iface\n");
979 local->network_latency_notifier.notifier_call =
980 ieee80211_max_network_latency;
981 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
982 &local->network_latency_notifier);
989 local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
990 result = register_inetaddr_notifier(&local->ifa_notifier);
995 #if IS_ENABLED(CONFIG_IPV6)
996 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed;
997 result = register_inet6addr_notifier(&local->ifa6_notifier);
1004 #if IS_ENABLED(CONFIG_IPV6)
1007 unregister_inetaddr_notifier(&local->ifa_notifier);
1010 #if defined(CONFIG_INET) || defined(CONFIG_IPV6)
1012 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1013 &local->network_latency_notifier);
1017 ieee80211_led_exit(local);
1018 ieee80211_remove_interfaces(local);
1021 ieee80211_wep_free(local);
1022 sta_info_stop(local);
1023 destroy_workqueue(local->workqueue);
1025 wiphy_unregister(local->hw.wiphy);
1026 fail_wiphy_register:
1027 if (local->wiphy_ciphers_allocated)
1028 kfree(local->hw.wiphy->cipher_suites);
1029 kfree(local->int_scan_req);
1032 EXPORT_SYMBOL(ieee80211_register_hw);
1034 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1036 struct ieee80211_local *local = hw_to_local(hw);
1038 tasklet_kill(&local->tx_pending_tasklet);
1039 tasklet_kill(&local->tasklet);
1041 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
1042 &local->network_latency_notifier);
1044 unregister_inetaddr_notifier(&local->ifa_notifier);
1046 #if IS_ENABLED(CONFIG_IPV6)
1047 unregister_inet6addr_notifier(&local->ifa6_notifier);
1053 * At this point, interface list manipulations are fine
1054 * because the driver cannot be handing us frames any
1055 * more and the tasklet is killed.
1057 ieee80211_remove_interfaces(local);
1061 cancel_work_sync(&local->restart_work);
1062 cancel_work_sync(&local->reconfig_filter);
1064 ieee80211_clear_tx_pending(local);
1065 rate_control_deinitialize(local);
1067 if (skb_queue_len(&local->skb_queue) ||
1068 skb_queue_len(&local->skb_queue_unreliable))
1069 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
1070 skb_queue_purge(&local->skb_queue);
1071 skb_queue_purge(&local->skb_queue_unreliable);
1073 destroy_workqueue(local->workqueue);
1074 wiphy_unregister(local->hw.wiphy);
1075 sta_info_stop(local);
1076 ieee80211_wep_free(local);
1077 ieee80211_led_exit(local);
1078 kfree(local->int_scan_req);
1080 EXPORT_SYMBOL(ieee80211_unregister_hw);
1082 static int ieee80211_free_ack_frame(int id, void *p, void *data)
1084 WARN_ONCE(1, "Have pending ack frames!\n");
1089 void ieee80211_free_hw(struct ieee80211_hw *hw)
1091 struct ieee80211_local *local = hw_to_local(hw);
1093 mutex_destroy(&local->iflist_mtx);
1094 mutex_destroy(&local->mtx);
1096 if (local->wiphy_ciphers_allocated)
1097 kfree(local->hw.wiphy->cipher_suites);
1099 idr_for_each(&local->ack_status_frames,
1100 ieee80211_free_ack_frame, NULL);
1101 idr_destroy(&local->ack_status_frames);
1103 wiphy_free(local->hw.wiphy);
1105 EXPORT_SYMBOL(ieee80211_free_hw);
1107 static int __init ieee80211_init(void)
1109 struct sk_buff *skb;
1112 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1113 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1114 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1116 ret = rc80211_minstrel_init();
1120 ret = rc80211_minstrel_ht_init();
1124 ret = rc80211_pid_init();
1128 ret = ieee80211_iface_init();
1136 rc80211_minstrel_ht_exit();
1138 rc80211_minstrel_exit();
1143 static void __exit ieee80211_exit(void)
1146 rc80211_minstrel_ht_exit();
1147 rc80211_minstrel_exit();
1151 ieee80211_iface_exit();
1157 subsys_initcall(ieee80211_init);
1158 module_exit(ieee80211_exit);
1160 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1161 MODULE_LICENSE("GPL");